Finding the Third Proportional to 639,426 and 954,751.50

Step by Step Solution

1. Step 1: Write the proportion equation
   639,426 : 954,751.50 = 954,751.50 : x
2. Step 2: Convert to fraction form
   639,426/954,751.50 = 954,751.50/x
3. Step 3: Cross multiply
   639,426x = 954,751.50 × 954,751.50
4. Step 4: Simplify right side
   639,426x = 911,550,426,752.25
5. Step 5: Solve for x
   x = 911,550,426,752.25/639,426
6. Step 6: Final answer
   x = 1,425,576.11